A154779 Number of terms with n digits in A154780.

1, 1, 2, 2, 4, 6, 12, 17, 34, 55, 98, 161, 288, 448, 811, 1265, 2145, 3425, 5860, 9305, 15384, 24690, 40445, 64715

Offset: 1

Author

M. F. Hasler, Jan 24 2009

Keywords

• nonn
• base

Comments

Does the ratio of consecutive terms, a(n+1)/a(n), tend to a finite limit?

Programs

PARI

print1("1,",#last=[35]); for(d=3,30, new=[]; forprime( p=0,9, for(k=1,#last, isprime((last[k]^2\10^d+t*last[k]/5)%10) & new=concat(new,last[k]+p*10^(d-1)))); print1(",",#last=new))