Atomic number corresponding to the element that is the first of the two middle elements in the n-th row of the periodic table of elements.

A349723

Atomic number corresponding to the element that is the first of the two middle elements in the n-th row of the periodic table of elements.

Terms

    a(0) =1a(1) =6a(2) =14a(3) =27a(4) =45a(5) =70a(6) =102a(7) =143a(8) =193a(9) =254a(10) =326a(11) =411a(12) =509a(13) =622a(14) =750a(15) =895a(16) =1057a(17) =1238a(18) =1438a(19) =1659a(20) =1901a(21) =2166a(22) =2454a(23) =2767a(24) =3105a(25) =3470a(26) =3862a(27) =4283a(28) =4733a(29) =5214

External references