A232100 a(n) = the position of A232099(n) in A055926.

41, 123, 205, 287, 369, 451, 533, 615, 697, 779, 861, 943, 1025, 1107, 1189, 1271, 1353, 1435, 1517, 1599, 1681, 1763, 1845, 1927, 2009, 2091, 2173, 2255, 2337, 2419, 2501, 2583, 2665, 2706, 2747, 2829, 2911, 2993, 3075, 3157, 3239, 3321, 3403, 3485, 3567, 3649

Offset

1,1

Comments

In range n=1..2215, each a(n) is a multiple of 41, with a(2215) = 177079 = 4319*41. In that range, all 2160 odd multiples 1, 3, 5, ..., 4319*41 occur, but only 55 even multiples, with a(34) = 66*41 = 2706 being the first one of them. The multipliers for even terms in that range seems to be given by 66*A047253(1..55) from 66*1 up to 66*A047253(55) = 66*65 = 4290. (Where A047253 gives the numbers not divisible by six).

Links

Antti Karttunen, Table of n, a(n) for n = 1..10007

Formula

A055926(a(n)) = A232099(n) for all n.

Prog

(Scheme, with memoizing definec-macro from Antti Karttunen's IntSeq-library)
(definec (A232100 n) (let ((x (A232099 n))) (let loop ((i (if (= 1 n) 1 (A232100 (- n 1))))) (if (= (A055926 i) x) i (loop (+ 1 i))))))

Crossrefs

Cf. A232099, A055926, A047253, A232741.

Sequence in context: A135793 A135792 A256347 * A195038 A067896 A205797

Adjacent sequences: A232097 A232098 A232099 * A232101 A232102 A232103

Keyword

nonn

Author

Antti Karttunen, Nov 18 2013

Status

approved