A176883 Sum of distances of numbers between successive powers of 2 (beginning with 2^1) to previous numbers with same number of prime factors, repetitions included. See example.

1, 6, 19, 55, 151, 359, 849, 1956, 4416, 9861, 21776, 47659, 103501, 223362, 479527, 1024599, 2180237, 4622633, 9769597, 20587721, 43272599, 90739538, 189867698, 396512548, 826579593, 1720267980, 3574753738, 7417943000, 15372756795, 31819255488

Offset: 1

Author

Daniel Tisdale, Apr 27 2010

Keywords

• nonn

Examples

			On (2,3,4), between the powers of 2, 3 is one number beyond previous prime 2. So the sum is 1. On (4,5,6,7,8), 5 is 2 beyond 3, 6 is 2 beyond 4, 7 is 2 beyond 5, for a sum of 2+2+2=6. On (8,9,10,11,12, 13,14,15,16), the distances are 3,1,4,4,2,4,1 for a sum of 19. And so on.
		

Crossrefs

Cf. A176884.

Extensions

a(5)-a(30) from Ray Chandler, May 05 2010