A255092 Least prime p such that p+n is product of (n+1) primes (with multiplicity).

2, 3, 43, 13, 239, 59, 171869, 569, 32797, 2551, 649529, 6133, 1708984363, 57331, 103630981, 65521, 301327031, 262127

Offset

0,1

Comments

For n>0, terms with odd indices 3, 13, 59, 569... are much smaller than neighbor terms with even indices.

Links

Table of n, a(n) for n=0..17.

Example

2+0=2(prime), 3+1=4=2*2, 43+2=45=3*3*5, 13+3=16=2^4, 239+4=243=3^5,59+5=64=2^6,171869+6=171875=5^6*11,569+7=574=2^6*3^2,
32797+8=32805=3^5*5, 2551+9=2590=2^9*5, 649529+10=649539=3^10*11, 6133+11=6143=2^11*3.

Crossrefs

Cf. A072875, A112998, A113000, A113008.

Sequence in context: A087571 A126018 A257467 * A237414 A051099 A162712

Adjacent sequences: A255089 A255090 A255091 * A255093 A255094 A255095

Keyword

nonn

Author

Zak Seidov, Feb 14 2015

Status

approved