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A102192
Iccanobirt semiprimes (2 of 15): Semiprime numbers in A102112.
2
4, 62, 885229, 1246986214, 6411178063, 12726051979, 107213343921600529, 2147942208584833933, 10354578286673927897, 58980651512479169892243191, 2180545853785440701368914883, 16670504896204082873702933353, 1970627022928300844150934760319, 8848738313604306954943751816182969
OFFSET
1,1
FORMULA
a(n) = A102112(A102172(n)).
MATHEMATICA
nxt[{a_, b_, c_}]:={b, c, a+IntegerReverse[b]+c}; Select[NestList[nxt, {0, 0, 1}, 100][[All, 1]], PrimeOmega[#]==2&] (* Harvey P. Dale, Jul 11 2021 *)
CROSSREFS
KEYWORD
nonn,less,base
AUTHOR
EXTENSIONS
Offset changed to 1 and more terms from Jinyuan Wang, Aug 08 2021
STATUS
approved