A127390 Sum of all n-digit highly composite numbers.

13, 180, 2460, 18060, 332640, 3548160, 37837800, 311351040, 3455131680, 32639967360, 479785466160, 3379449593520, 44734582292400, 527257688958000, 3493634344200000, 31840983413038800, 408373247583100800

Offset: 1

Author

Parthasarathy Nambi, Mar 30 2007

Keywords

• nonn
• base

Examples

			If n=1 then the sum of the highly composite numbers 1+2+4+6 = 13 which is the first term in the sequence.
If n=2 then the sum of the highly composite numbers 12+24+36+48+60 = 180 which is the second term in the sequence.
		

Links

• Robert G. Wilson v, Table of n, a(n) for n = 1..76
• Graeme McRae, Highly Composite Numbers
• S. Ramanujan, Highly composite numbers, Proceedings of the London Mathematical Society, 2, XIV, 1915, 347 - 409.

Crossrefs

Cf. A002182.

Extensions

More terms from Robert G. Wilson v, Apr 08 2007