A178441 INVERT transform of A058187, the tetrahedral numbers with repeats.

1, 2, 7, 17, 46, 119, 311, 812, 2118, 5530, 14431, 37668, 98313, 256602, 669742, 1748052, 4562490, 11908280, 31081099, 81122927, 211734137, 552634698, 1442399007, 3764720003, 9826072122, 25646447377

Offset: 0

Author

Gary W. Adamson, Dec 22 2010

Keywords

• nonn

Examples

			a(4) = 46 = (10, 4, 4, 1, 1) dot (1, 1, 2, 7, 17) = (10 + 4 + 8 + 7 + 17).
		

Links

• Index entries for linear recurrences with constant coefficients, signature (2,3,-3,-3,3,1,-1).

Crossrefs

Cf. A058187.

Formula

G.f.: 1/ ( 1-2*x-3*x^2+3*x^3+3*x^4-3*x^5-x^6+x^7 ). - R. J. Mathar, Apr 04 2012

Extensions

Corrected by R. J. Mathar, Apr 04 2012