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 A077558 Triangle in which the n-th row contains n numbers beginning with n that have the same prime signature as n. 3
 1, 2, 3, 3, 5, 7, 4, 9, 25, 49, 5, 7, 11, 13, 17, 6, 10, 14, 15, 21, 22, 7, 11, 13, 17, 19, 23, 29, 8, 27, 125, 343, 1331, 2197, 4913, 6859, 9, 25, 49, 121, 169, 289, 361, 529, 841, 10, 14, 15, 21, 22, 26, 33, 34, 35, 38, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 12, 18, 20 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..69. EXAMPLE 1; 2,3; 3,5,7; 4,9,25,49; 5,7,11,13,17; 6,10,14,15,21,22; ... PROG (Haskell) import Data.List (genericTake) a077558 n k = a077558_row n !! (k-1) a077558_row n = n : genericTake (n - 1) (filter ((== a046523 n) . a046523) [n + 1 ..]) a077558_tabf = map a077558_row [1..] -- Reinhard Zumkeller, Jun 05 2013 CROSSREFS Cf. A077559. Cf. A046523. Sequence in context: A081493 A144680 A209702 * A122444 A373751 A066072 Adjacent sequences: A077555 A077556 A077557 * A077559 A077560 A077561 KEYWORD nonn,tabl AUTHOR Amarnath Murthy, Nov 10 2002 EXTENSIONS Corrected by Al Arnold, Jul 04, 2003 More terms from Ray Chandler, Jul 17 2003 STATUS approved

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Last modified August 12 08:23 EDT 2024. Contains 375085 sequences. (Running on oeis4.)