1,2

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

Glaisher, J. W. L.; Messenger of Math., 28 (1898), 36-79, see esp. p. 51.

A. Fletcher, J. C. P. Miller, L. Rosenhead and L. J. Comrie, An Index of Mathematical Tables. Vols. 1 and 2, 2nd ed., Blackwell, Oxford and Addison-Wesley, Reading, MA, 1962, Vol. 1, p. 75.

A000364(n) * (3^(2n)+1)/2.

a(n+1) = Sum_{k, 0<=k<=n} A086646(n, k)*(-4)^k*9^(n-k). - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Aug 26 2005

Sequence in context: A128678 A012811 A060486 this_sequence A005333 A162087 A068531

Adjacent sequences: A002435 A002436 A002437 this_sequence A002439 A002440 A002441

nonn,easy,nice

N. J. A. Sloane (njas(AT)research.att.com).

More terms from H. P. Robinson.