72451

Appears in sequences

• Iccanobirt numbers (14 of 15): a(n) = R(R(a(n-1)) + R(a(n-2)) + a(n-3)), where R is the digit reversal function A004086.at n=19A102124
• Iccanobirt semiprimes (14 of 15): Semiprime numbers in A102124.at n=2A102204
• Number of (n+2)X(2+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101.at n=9A260469