1,2

0! + 1! + 3! = 2! + 3! = 2^3; 1! + 2! + 4! = 3^3; 2! + 3! + 4! = 0! + 1! + 3! + 4! = 2^5; 0! + 1! + 3! + 5! = 2! + 3! + 5! = 2^7; 1! + 2! + 3! + 6! = 3^6 (= 27^2).

Cf. A025494, A051761.

Sequence in context: A116002 A097054 A056824 this_sequence A066215 A086213 A131548

Adjacent sequences: A051757 A051758 A051759 this_sequence A051761 A051762 A051763

nonn

Paul.Jobling(AT)WhiteCross.com Thu Aug 10 07:10:41 2000