A112417 Sequence is generated as in A048985, but primes are instead written in decreasing order before being concatenated.

1, 2, 3, 10, 5, 14, 7, 42, 15, 22, 11, 58, 13, 30, 23, 170, 17, 62, 19, 90, 31, 46, 23, 234, 45, 54, 63, 122, 29, 94, 31, 682, 47, 70, 61, 250, 37, 78, 55, 362, 41, 126, 43, 186, 95, 94, 47, 938, 63, 182, 71, 218, 53, 254, 93, 490, 79, 118, 59, 378, 61, 126, 127, 2730

Offset: 1

Author

Leroy Quet, Dec 09 2005

Keywords

• base
• nonn

Examples

			12 = 3 * 2^2, with prime divisors written in descending order.
So we have 3 = 11 binary, 2 = 10 binary, 2 = 10 binary, which is (after concatenation) 111010. So a(12) is 111010 = 58 when converted from binary to decimal.
		

Links

• Diana Mecum, Table of n, a(n) for n = 1..847

Crossrefs

Cf. A004676, A048985.

Extensions

More terms from Diana L. Mecum, Jul 14 2007