201996

Appears in sequences

• Numbers m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,23.at n=20A064248
• Expansion of 1/(1 - x - x^2 - x^4 + x^5 + x^7).at n=25A260710