A117117 A sequence related to M-partitions.

1, 1, 2, 4, 6, 8, 13, 15, 21, 29, 37, 45, 62, 70, 89, 108, 132, 151, 191, 210, 256, 296, 350, 390, 476, 516, 610, 684, 795, 869, 1025, 1099, 1274, 1399, 1593, 1718, 1994, 2119, 2414, 2614, 2949, 3149, 3585, 3785, 4267, 4577, 5099, 5409, 6102, 6412, 7145, 7603, 8422

Offset

0,3

Links

Table of n, a(n) for n=0..52.

O. J. Rodseth, Enumeration of M-partitions, Discrete Math., 306 (2006), 694-698. (See E(x).)

Maple

# To get about 80 terms, first define B and D2 as in A117115. E2:=add( x^(2^(j+1)-4)*subs(x=x^(3*2^(j-1)), D2)*mul(1/(1-x^(2^i)), i=0..j), j=1..8); series(E2, x, 81);

Crossrefs

Cf. A000123, A100529, A117115.

Sequence in context: A325557 A283769 A338352 * A135109 A281615 A213506

Adjacent sequences: A117114 A117115 A117116 * A117118 A117119 A117120

Keyword

nonn

Author

N. J. A. Sloane, Apr 26 2006

Status

approved