A171924 Records in A031883 (positions).

1, 2, 6, 14, 36, 122, 162, 450, 2364, 4760, 4818, 8541, 19570, 44514, 47448, 114885, 378956, 384324, 542246, 1275572, 1385164, 3865640, 4514352, 5226312, 6271502, 12817002, 18665964, 19815336, 33506604, 42712210

Offset

1,2

Links

Table of n, a(n) for n=1..30.

Crossrefs

Cf. A000959, A031883, A171923.

Sequence in context: A077937 A077981 A006653 * A144530 A248113 A339985

Adjacent sequences: A171921 A171922 A171923 * A171925 A171926 A171927

Keyword

nonn

Author

R. J. Mathar, Oct 23 2010

Extensions

a(16)-a(30) from Donovan Johnson, Oct 24 2010

Status

approved