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 A255872 Smallest Rhonda number to base b = n-th composite number, cf. A002808. 14
 10206, 855, 1836, 15540, 1568, 560, 11475, 2392, 1000, 1470, 1815, 1632, 2695, 2080, 6764, 7788, 4797, 3094, 3024, 1944, 756, 5661, 8232, 1000, 12296, 5824, 4624, 4851, 8262, 6561, 16583, 14616, 6545, 7225, 11310, 18382, 1995, 16896, 2940, 23465, 8464, 3348 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS See A099542 for definition of Rhonda numbers and for more links. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..1000 Eric Weisstein's World of Mathematics, Rhonda Number EXAMPLE . n | b | a(n) | a(n) in base b | factorization . ----+----+--------------------+-----------------+-------------- . 1 | 4 | 10206 = A100968(1) | [2,1,3,3,1,3,2] | 2*3^6*7 . 2 | 6 | 855 = A100969(1) | [3,5,4,3] | 3^2*5*19 . 3 | 8 | 1836 = A100970(1) | [3,4,5,4] | 2^2*3^3*17 . 4 | 9 | 15540 = A100973(1) | [2,3,2,7,6] | 2^2*3*5*7*37 . 5 | 10 | 1568 = A099542(1) | [1,5,6,8] | 2^5*7^2 . 6 | 12 | 560 = A100971(1) | [3,10,8] | 2^4*5*7 . 7 | 14 | 11475 = A100972(1) | [4,2,7,9] | 3^3*5^2*17 . 8 | 15 | 2392 = A100974(1) | [10,9,7] | 2^3*13*23 . 9 | 16 | 1000 = A100975(1) | [3,14,8] | 2^3*5^3 . 10 | 18 | 1470 = A255735(1) | [4,9,12] | 2*3*5*7^2 . 11 | 20 | 1815 = A255732(1) | [4,10,15] | 3*5*11^2 . 12 | 21 | 1632 | [3,14,15] | 2^5*3*17 . 13 | 22 | 2695 | [5,12,11] | 5*7^2*11 . 14 | 24 | 2080 | [3,14,16] | 2^5*5*13 . 15 | 25 | 6764 | [10,20,14] | 2^2*19*89 . 16 | 26 | 7788 | [11,13,14] | 2^2*3*11*59 . 17 | 27 | 4797 | [6,15,18] | 3^2*13*41 . 18 | 28 | 3094 | [3,26,14] | 2*7*13*17 . 19 | 30 | 3024 = A255736(1) | [3,10,24] | 2^4*3^3*7 . 20 | 32 | 1944 | [1,28,24] | 2^3*3^5 PROG (Haskell) a255872 n = head \$ filter (rhonda b) \$ iterate zeroless 1 where -- function rhonda as defined in A099542 zeroless x = 1 + if r < b - 1 then x else b * zeroless x' where (x', r) = divMod x b b = a002808 n CROSSREFS Cf. A002808, A100968, A100969, A100970, A100973, A099542, A100971, A100972, A100974, A100975, A255735, A255732, A255736. Cf. A255880. Row n=1 of A291925. Sequence in context: A105582 A243819 A258890 * A291925 A255880 A100968 Adjacent sequences: A255869 A255870 A255871 * A255873 A255874 A255875 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Mar 08 2015 STATUS approved

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Last modified February 24 12:51 EST 2024. Contains 370303 sequences. (Running on oeis4.)