A095219 First differences of A053067.

22, 433, 78454, 1112052505, 160606060606, 22070707070707, 2908080808080808, 370909090909090909, 46101010101010101010, 5611111111111111111111, 671212121212121212121212, 79131313131313131313131313, 9293949517171716261615233314205014, 106107108099816161515133215015015015015015015

Offset: 2

Author

Amarnath Murthy, Jun 10 2004

Keywords

• base
• easy
• less
• nonn

Examples

			a(2) = 456 - 23 = 433.
		

Programs

Maple

A000124 := proc(n) n*(n+1)/2+1 ; end proc:
catL := proc(L) local a; a := op(1,L) ; for i from 2 to nops(L) do a := cat2(a,op(i,L)) ; end do; a; end proc:
A053067 := proc(n) local l ; l := A000124(n-1) ; catL([seq(k,k=l..l+n-1)]) ; end proc:
A095219 := proc(n) A053067(n+1)-A053067(n) ; end proc:
seq(A095219(n),n=1..15) ; # R. J. Mathar, Oct 14 2010

Extensions

Definition clarified by R. J. Mathar, Oct 14 2010