cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A226100 Main diagonal A(n,n) of matrix A(k,n) = n-th k-th power that becomes prime when its most significant (i.e., leftmost) decimal digit is removed.

Original entry on oeis.org

12, 289, 729, 20151121, 371293, 2839760855281, 24160660561265139, 241100240228887100161, 3421941488772218992567, 845219547726738091164049, 7506514445791062595879589895041, 293936151563356954592299567713259041, 6657844787831219696900816415217242830357
Offset: 1

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Author

Jonathan Vos Post, May 26 2013

Keywords

Comments

Row 1 = A(1,n) = A226099. Row 2 = A(2,n) = A225873. Row 3 = A(3,n) = A226090. Row 4 = A(4,n) = A226092. Row 5 = A(5,n) = A226098.

Examples

			a(1) = A(1,1) = 12 = first number whose first power (itself) becomes prime when its most significant (or leftmost) digit is removed.
a(2) = A(2,2) = 289 = second square which becomes prime when its most significant (or leftmost) digit is removed.
a(3) =
		

Crossrefs

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