A086863 a(n)=floor{square((1*n^0+1*n^1+2*n^2+4*n^3)/(1*n^0+2*n^1+1*n^2))}

4, 22, 66, 137, 238, 370, 533, 727, 953, 1211, 1500, 1821, 2174, 2559, 2976, 3424, 3905, 4418, 4962, 5538, 6147, 6787, 7460, 8164, 8900, 9668, 10469, 11301, 12165, 13061, 13989, 14950, 15942, 16966, 18022, 19110, 20230, 21383, 22567, 23783

Offset

1,1

Links

Table of n, a(n) for n=1..40.

Example

a(2)=floor{square((1*2^0+1*2^1+2*2^2+4*2^3)/(1*2^0+2*2^1+1*2^2))}=floor{square(4.77778)}=floor(22.8272)=22

Crossrefs

Cf. A086790, A085899.

Sequence in context: A189953 A174814 A106846 * A241689 A052149 A062966

Adjacent sequences: A086860 A086861 A086862 * A086864 A086865 A086866

Keyword

easy,nonn

Author

Wang Dan (wangdan01(AT)lycos.com), Aug 20 2003

Extensions

Definition corrected by M. F. Hasler, Jul 23 2007

Status

approved